Aims To evaluate changes in clinico-epidemiologic characteristics of patients who presented
               with acute upper gastrointestal bleeding (AUGIB) during the last 10 years in Serbia
            
               Methods Data from 126 patients admitted with AUGIB in our center from January 1. to December
               31., 2018. were compared with retrospectively collected data from 124 patients admitted
               with AUGIB in 2013. year and with 121 patients from 2008. year.
            
               Results Mean age of patients increased from 63.84±14.1 years to 65.71±14.27 and 68.92±12.77,
               and the number of patient´s comorbidity,too. The percentage of NSAID´s and antiplatelets
               use remained stable (63.63% vs. 68.55% vs. 65.87%), whereas the use of oral anticoagulants
               drugs increased significantly during this period (from 6.44%, across 12.1% in 2013.
               to 16.67%, P=0.041). In 2008. year 31.4% of AUGIB was from duodenal ulcer following gastric ulcer
               (26.44%), variceal bleeding (15.7%), gastric erosions (12.4%), duodenal erosions (8.26%),
               gastric and oesophageal cancers (7.44%) and other reasons in 5.79%. Main reason for
               AUGIB in 2013. year was also duodenal ulcer (25%), duodenal erosions are second with
               19.35% whilst gastric ulcer (15.32%), gastric erosions (10.48%), gastric and oesophageal
               cancers (12.9%) and variceal bleeding (6.45%) are coming after. In the year 2018.
               most frequent reason for AUGIB were duodenal erosions with 24.6%, following duodenal
               ulcers 23.42%, gastric ulcers (15.87%), variceal bleeding (11.11%), gastric erosions
               (8.73%), gastric and oesophageal cancers (8.73%) and other reasons with 16.67%. During
               the period of these 10 years duodenal erosions increased significantly (X2=11.84, p=0.0027, p‹0.05) while gastric ulcer decreased significantly (X2=6.21, p=0.044, p‹0.05). Overall mortality was 14.05% in 2008., 9.68% in 2013. and
               10.32% in the year 2018.
            
               Conclusions Patients with AUGIB are older with more comorbidities, their mortality remains unchanged.
               Main risk factors for AUGIB are NSAID´s use with clear trend of decreasing of peptic
               ulcer disease, mainly gastric ulcers like a reason of haemmoraige.